Investments in Equity Method Affiliates (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Schedule of Investment in Equity Method Affiliates
Balance at January 1, 2012			$ 6,076
Investments / advances			6
Distributions/repayments			(5,734)
Earnings / (loss) realized	1,526	4,435	2,042	4,530
Balance at June30, 2012	2,390		2,390
Star Asia Manager [Member]
Schedule of Investment in Equity Method Affiliates
Balance at January 1, 2012			1,046
Distributions/repayments			(1,050)
Earnings / (loss) realized			580
Balance at June30, 2012	576		576
Deep Value GP [Member]
Schedule of Investment in Equity Method Affiliates
Balance at January 1, 2012			21
Earnings / (loss) realized			(14)
Balance at June30, 2012	7		7
Deep Value GP II [Member]
Schedule of Investment in Equity Method Affiliates
Balance at January 1, 2012			33
Earnings / (loss) realized			3
Balance at June30, 2012	36		36
Star Asia SPV [Member]
Schedule of Investment in Equity Method Affiliates
Balance at January 1, 2012			466
Distributions/repayments			(526)
Earnings / (loss) realized			724
Balance at June30, 2012	664		664
Star Asia Opportunity [Member]
Schedule of Investment in Equity Method Affiliates
Balance at January 1, 2012			4,460
Distributions/repayments			(3,908)
Earnings / (loss) realized			619
Balance at June30, 2012	1,171		1,171
Star Asia Capital Management [Member]
Schedule of Investment in Equity Method Affiliates
Balance at January 1, 2012			50
Investments / advances			6
Distributions/repayments			(250)
Earnings / (loss) realized			130
Balance at June30, 2012	(64)		(64)
Duart Capital and Other [Member]
Schedule of Investment in Equity Method Affiliates
Balance at January 1, 2012
Investments / advances
Distributions/repayments
Earnings / (loss) realized
Balance at June30, 2012